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GB1470354A - Apparatus for supporting magnetic tape - Google Patents

Apparatus for supporting magnetic tape

Info

Publication number
GB1470354A
GB1470354A GB2113875A GB2113875A GB1470354A GB 1470354 A GB1470354 A GB 1470354A GB 2113875 A GB2113875 A GB 2113875A GB 2113875 A GB2113875 A GB 2113875A GB 1470354 A GB1470354 A GB 1470354A
Authority
GB
United Kingdom
Prior art keywords
rotor
tape
head
inch
contour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2113875A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1470354A publication Critical patent/GB1470354A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support

Landscapes

  • Advancing Webs (AREA)
  • Magnetic Heads (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

1470354 Supporting magnetic tape in rotating head apparatus INTERNATIONAL BUSINESS MACHINES CORP 19 May 1975 [15 July 1974] 21138/75 Heading G5R A magnetic tape 13 is supported across the path of a rotating, flying magnetic head, mounted on a rotor 11, by tape support means 14, 15 one on either side of rotor 11, the rotor 11 having an annular outer surface 25 whose outer diameter extends outwardly beyond both supports 14, 15 and which is effective to support the tape 13 with a gas bearing along the rotor path to thereby produce localized tape deflection coincident with this path, and the magnetic head extending radially outwardly beyond the outer diameter of the annular surface 25 of the rotor 11 to thereby produce a moving tent 40 or 41 of localized tape deflection coincident with the head. In a helical tape wrap apparatus, which may be of the type shown in Specifications 1,420,724 and 1,457,355, the rotor 11 carries a read head (32) and a write head (33), Figs. 5, 6 (not shown), which may be of the type shown in Specifications 1,436,396 and 1,470,353. Rotor 11 is flanked by stationary cylindrical mandrels 14, 15, which may be as disclosed in Specification 1,456,166, and support the tape 13 with an air bearing providing a spacing 21 of 0À002 inch. The annular surface 25 of rotor 11 has an arcuate contour in cross-section in a plane containing the rotor axis with a radius of curvature of about 10 inches, so that the peak of the contour 25 projects out beyond surfaces 23, 24 of mandrels 14, 15 whereas the edges (19A), Fig. 3 (not shown), of contour 25 may be level with or below surfaces 23, 24, e.g. mandrels 14, 15 are of 3À5 inch diameter and rotor 11 is of diameter 3À499 inches at edges (19A) and has a maximum diameter of 3À505 inches. Rotation of rotor 11 produces a hydrodynamic gas bearing for tape 13 and in addition rotor 11 may be pressurized to define a hydrostatic air bearing for tape 13, whereby the spacing 22 may be 0À0003 to 0À002 inch at the maximum diameter of rotor 11 and in regions away from the heads (32), (33) which protrude about 0À004 inch above such maximum diameter and produce localized moving tents 40, 41 in the tape 13 whereat the tape flies above the heads with a spacing of 5 to 20 microinches. An alternative contour for rotor 11 is disclosed with respect to Fig. 3a (not shown), unsuitable contours being disclosed with respect to Figs. 3b, 3c (not shown).
GB2113875A 1974-07-15 1975-05-19 Apparatus for supporting magnetic tape Expired GB1470354A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/488,341 US3961369A (en) 1974-07-15 1974-07-15 Rotating head apparatus having a protruding diameter headwheel which supports a protruding flying head

Publications (1)

Publication Number Publication Date
GB1470354A true GB1470354A (en) 1977-04-14

Family

ID=23939356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2113875A Expired GB1470354A (en) 1974-07-15 1975-05-19 Apparatus for supporting magnetic tape

Country Status (8)

Country Link
US (1) US3961369A (en)
JP (1) JPS5620627B2 (en)
BR (1) BR7504481A (en)
CA (1) CA1048149A (en)
DE (1) DE2530338A1 (en)
FR (1) FR2279192A1 (en)
GB (1) GB1470354A (en)
IT (1) IT1039302B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52146607A (en) * 1976-05-31 1977-12-06 Nippon Telegr & Teleph Corp <Ntt> Rotary head tape support
US4408317A (en) * 1980-05-19 1983-10-04 Microcomputer Systems, Inc. Magnetic tape apparatus
US4451861A (en) * 1980-05-19 1984-05-29 Microcomputer Systems, Inc. Magnetic tape apparatus having means for leading magnetic tape from a supply reel to a take-up reel
US4354211A (en) * 1980-05-19 1982-10-12 Microcomputer Systems Corporation Magnetic tape apparatus
US4686597A (en) * 1985-09-27 1987-08-11 Rca Corporation Rotating head apparatus including a flying tape edge guide
US4839762A (en) * 1986-06-25 1989-06-13 Canon Kabushiki Kaisha Rotary head device
JPS6378304A (en) * 1986-09-20 1988-04-08 Pioneer Electronic Corp Rotary head type digital audio recording and reproducing device
US4823222A (en) * 1987-10-29 1989-04-18 Ampex Corporation Webbed scanner window
US5777823A (en) * 1996-02-27 1998-07-07 Gavit; Stephan E. Tape transport apparatus incorporating porous air bearing
US6118626A (en) * 1997-03-11 2000-09-12 Massachusetts Institute Of Technology Contact sheet recording with a self-acting negative air bearing
DE19845120B4 (en) * 1997-09-30 2008-03-13 Matsushita Electric Industrial Co. Ltd. Rotatable head drum
US6719238B1 (en) 1998-12-17 2004-04-13 Imation Corp. High speed tape packing
US6722608B1 (en) 1999-10-28 2004-04-20 Segway Systems, Llc Porous air bearings for tape transports and method of fabrication thereof
US6381096B1 (en) * 1999-12-02 2002-04-30 Storage Technology Corporation Tape transport with air bearings
US6909581B2 (en) * 2003-05-02 2005-06-21 Segway Systems, Llc Tape head assembly with air bearing guide
US20100196739A1 (en) * 2009-02-05 2010-08-05 Tdk Corporation Magnetic head, manufacturing method therefor and magnetic tape device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078352A (en) * 1959-04-17 1963-02-19 Teletrak Corp Signal translating apparatus and method
NL246245A (en) * 1959-12-09
US3139489A (en) * 1960-04-11 1964-06-30 Ampex Tape stabilizing means
NL299625A (en) * 1962-10-24
US3404241A (en) * 1965-02-12 1968-10-01 Ampex Helical scan magnetic tape apparatus with self-energized air lubrication
US3333753A (en) * 1965-06-17 1967-08-01 Ampex Helical scan magnetic tape apparatus with a squeeze film bearing
US3422230A (en) * 1965-06-18 1969-01-14 Matsushita Electric Ind Co Ltd Mounting structure for rotating magnetic heads
US3401236A (en) * 1965-06-23 1968-09-10 Ampex Magnetic tape apparatus with head positioning means
US3510604A (en) * 1966-02-23 1970-05-05 Rca Corp Drum construction for helical scan tape recorder
US3504136A (en) * 1966-03-21 1970-03-31 Fowler Allan R Drum type video tape recorder with a tape wrap of more than 360
JPS4327411Y1 (en) * 1966-11-25 1968-11-13
US3688285A (en) * 1970-02-16 1972-08-29 Ibm Flexible disk magnetic recording device
US3821813A (en) * 1972-12-27 1974-06-28 Ibm Wasp waist head for flying flexible magnetic storage medium over head
US3840894A (en) * 1973-04-02 1974-10-08 Ibm Wide rotor for stable support of tape along path of transducer carried by rotor

Also Published As

Publication number Publication date
CA1048149A (en) 1979-02-06
JPS5620627B2 (en) 1981-05-14
DE2530338A1 (en) 1976-01-29
FR2279192A1 (en) 1976-02-13
BR7504481A (en) 1976-07-06
IT1039302B (en) 1979-12-10
JPS5133607A (en) 1976-03-22
FR2279192B1 (en) 1980-06-27
US3961369A (en) 1976-06-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee